posterior talofibular ligament

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Related to posterior talofibular ligament: Calcaneofibular ligament

pos·te·ri·or ta·lo·fib·u·lar lig·a·ment

the nearly horizontal fibrous band that extends from the posterior border of the talus to the malleolar fossa.

posterior talofibular ligament

Abbreviation: PTL
A ligament of the lateral ankle that attaches the posterior portion of the talus, and a portion of the posterolateral calcaneus, to the medial malleolus. The posterior talofibular ligament limits the excessive dorsiflexion and inversion of the talus within the ankle mortise.
See also: ligament

posterior talofibular ligament

; PTFL posterior part of lateral collateral ligament of ankle joint; see Table 1
Table 1: Classification of ankle ligament inversion injuries
TypeCharacteristics of the injury to the ankle ligament
Grade IHistory of mild inversion injury
Overstretching of lateral collateral ligament + microscopic tears of ATFL fibres
Stable ankle joint but some restriction in range of motion/weight-bearing
Mild local swelling without bruising/ecchymosis along lateral border of ankle
Pinpoint area of tenderness overlying area of ligament injury
Grade IIHistory of moderate inversion injury
Complete tear of ATFL and partial tear of CFL
Mild/moderate ankle instability with restricted range of motion
Moderate swelling over anterior lateral aspect of ankle with marked soft-tissue bruising/ecchymosis or haemorrhage in area of injury
Marked pain on direct palpation of ATFL
Grade IIIHistory of severe inversion injury
Complete tear of ATFL, CFL and underlying joint capsule
Marked instability and laxity of ankle with positive anterior drawer test, talar inversion tilt and inability to evert foot at subtalar joint
Severe swelling along lateral border of ankle and heel with marked haemorrhage and ecchymosis
Discrete pain and tenderness of soft tissues overlying ATFL, CFL and anterolateral joint capsule

ATFL, anterior talofibular ligament; CFL, calcaneofibular ligament.

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